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Crystallization Processes of R_{4.5}Fe_{77}B_{18.5} (R = Pr, Nd) Amorphous Alloys

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Musiał A., Śniadecki Z., Pagnani D., Idzikowski B.

Acta Physica Polonica A

2014

vol. 126

issue 1

316-317

The amorphous alloys R_{4.5}Fe_{77}B_{18.5} (R=Pr, Nd) were prepared by melt-spinning technique under argon atmosphere on a cooper wheel rotating with surface velocity of 25 m·s^{-1}. The ribbons have been investigated by means of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Temperatures of crystallization for Pr_{4.5}Fe_{77}B_{18.5}, measured at the heating rate 20 K/min, are equal T_{x1}=591°C for the first exothermic effect and T_{x2}=603°C for the second one (for Nd_{4.5}Fe_{77}B_{18.5} T_{x1}=594°C and T_{x2}=633°C). In the amorphous ribbons the crystallization of Fe_{3}B phase in the first step, followed by the crystallization of Pr_{2}Fe_{23}B_{3} and Nd_{2}Fe_{23}B_{3}, was observed. Both later phases appear in the process of recrystallization, immediately after Fe_{3}B formation.

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1 Acta Physica Polonica A

1 2014

1 Idzikowski B.

1 Musiał A.

1 Pagnani D.

1 Śniadecki Z.

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Crystallization Processes of R_{4.5}Fe_{77}B_{18.5} (R = Pr, Nd) Amorphous Alloys